EP 0304777 A3 19890927 - PROCESS FOR THE PREPARATION OF CHROMAN DERIVATIVES OR OF D-ALPHA-TOCOPHEROL
Title (en)
PROCESS FOR THE PREPARATION OF CHROMAN DERIVATIVES OR OF D-ALPHA-TOCOPHEROL
Publication
Application
Priority
CH 324487 A 19870825
Abstract (en)
[origin: US4876369A] The present invention is directed to a novel process for producing chromane derivatives, which are suitable as intermediates for the manufacture of d- alpha -tocopherol (natural vitamin E), and with a process for producing d- alpha -tocopherol itself.
IPC 1-7
IPC 8 full level
C07D 311/70 (2006.01); B01J 31/02 (2006.01); C07D 311/72 (2006.01)
CPC (source: EP US)
C07D 311/72 (2013.01 - EP US)
Citation (search report)
[A] EP 0058945 A2 19820901 - EISAI CO LTD [JP]
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI NL
DOCDB simple family (publication)
EP 0304777 A2 19890301; EP 0304777 A3 19890927; EP 0304777 B1 19910904; AT E66918 T1 19910915; DE 3864632 D1 19911010; DK 422788 A 19890226; DK 422788 D0 19880728; JP S6483077 A 19890328; US 4876369 A 19891024; US 4958035 A 19900918
DOCDB simple family (application)
EP 88113307 A 19880817; AT 88113307 T 19880817; DE 3864632 T 19880817; DK 422788 A 19880728; JP 20650188 A 19880822; US 23525788 A 19880823; US 37300089 A 19890629